20130089247 | Method of Noise Reduction in Digital X-Ray Frames Series - Frame-by-frame estimation of signal-dependent noise variance involves morphological deletion of pixel values of noise image corresponding with edges of the initial frame. A noise map is computed as a pixel-by-pixel estimation of noise variance of the initial digital image. The noise reduction procedure involves three successive stages: frame-by-frame estimation of signal-dependent noise variance; motion estimation and compensation, flicker-effect estimation and compensation; recursive averaging providing motion compensation artifacts correction. | 04-11-2013 |